Cardiosource [ http://www.cardiosource.com ]
Comprehensive online cardiovascular information and educational resources produced by the American College of Cardiology.

The Heart: An Online Exploration [ http://sln.fi.edu/biosci/heart.html ]
Examines the complexities of the heart's development and structure, as well as blood flow, and the general workings of the circulatory system. Also includes a section on heart health.

CTSNet [ http://www.ctsnet.org ]
Online resource for cardiothoracic surgeons. Includes information on professional and humanitarian organizations, journals, conferences, and discussion forums.

Heart Surgery Forum [ http://www.hsforum.com ]
Provides heart related resources for doctors including recent articles, discussion forums, and the latest news.

InCirculation.net [ http://www.incirculation.net ]
Offers cardiovascular resources for international HCPs with cardiology information, cardiovascular medicine news, an online journals. Provided by AstraZeneca.

lipidhealth [ http://www.lipidhealth.org ]
National Lipid Education Council's cholesterol management resource for healthcare professionals. Provides information on atherosclerosis, coronary heart disease risk factors, and clinical trials involving lipid modification therapy.

TheHeart.org [ http://theheart.org ]
Provides news and educational resources for cardiologists and healthcare professionals. Includes the latest articles, a resource center, and discussion forum

Lipids Online [ http://www.lipidsonline.org ]
Cardiovascular educational resources for health professionals. Includes slide library, presentations, and commentaries on research.

Gross Physiology of the Cardiovascular System [ http://cardiovascular.cx ]
Global overview of the mechanical function of the cardiovascular system including the factors governing cardiac output.

CardioGuide [ http://www.cardioguide.com ]
Provides a specialized search engine for cardiac disorders and problems. Also includes a section of commonly searched terms.

CathLab.com [ http://www.cathlab.com ]
Online resource for cardiologists, and other heart specialists. Includes information on heart education, calendar of upcoming events, publications, and organizations

Cardiology Explained [ http://www.rjmatthewsmd.com ]
Cardiology and heart disease information and definitions presented by Robert Matthews, MD. Includes flash animation of heart functions, as well as links to information on heart disorders.

Chest Pain Perspectives [ http://www.chestpainperspectives.com ]
Diagnostic strategies being incorporated to cost-effectively manage patients while minimizing the impact on available resources, both human and material.

Apollo Lipids [ http://www.apollolipids.org ]
Offers online information and continuing medical education programs concerning dyslipidemia and cardiovascular disease prevention and treatment.

Endothelinscience.com [ http://www.endothelinscience.com ]
Discusses the role of endothelin (ET), the third major neurohormonal pathway, in cardiopulmonary diseases such as pulmonary arterial hypertension and heart failure.